P0505

2017-10-10

Description:

  • The fault code P0505 indicates that there is an issue with the Idle Control System. This may cause the engine to perform poorly at an idle or stall altogether.

Possible Symptoms:

  • Engine stalls or runs poorly at an idle

  • Illuminated check engine light

  • Fluctuating idle speed

  • Rough idle or stalling when coming to a stop

Possible Causes:

  • Malfunctioning Idle Air Control (IAC) valve

  • Dirty or clogged throttle body

  • Vacuum leaks in the intake manifold or hoses

  • Failed engine control module (ECM)

Related Parts:

  • Idle Air Control System: IAC (Idle Air Control) System controls the speed of the engine when it is idling. This car's engine may keep stalling due to problems with the IAC

Possible Solutions:

  • Replace the Idle Air Control (IAC) valve

  • Clean or replace the throttle body

  • Check and repair any vacuum leaks in the intake manifold or hoses

  • Replace the engine control module (ECM) if necessary

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